technical and personal ramblings

Creating a new volume group, adding a disk to it and making it usable

#fdisk /dev/sda5 (or /dev/mapper/mpathx if multipathing) … create new partition, type lvm (8e), write changes to disk
#partprobe
#pvscan
#pvdisplay
#kpartx -a /dev/mapper/mpathX if it’s a multipathed device using dm-mulipath, otherwise skip this step
#pvcreate /dev/sda5 or /dev/mapper/mpathXpX  (initializes partition for LVM)
#vgcreate vg02 /dev/sda5 or /dev/mapper/mpathXpX (or vgextend vg02 /dev/sda5 or /dev/mapper/mpathXpX to add to a volume group)
#lvcreate -L 500G -n lvora_backup vg02  (or lvextend to add)
#mkfs -V -t ext3 /dev/mapper/vg02-lvora_backup  (or resize2fs to extend the fs)
#mount /dev/mapper/vg02-lvora_backup /ora_backup

edit /etc/fstab:

/dev/vg02/lvora_backup  /ora_backup             ext3    defaults        1 2

Extending a logical volume if the vg has available space

lvextend -L +512M /dev/rootvg/lvtmp
resize2fs /dev/rootvg/lvtmp